Fan attachment for sewing-machines.



L. D. COREY.

FAN ATTACHMENT FOR SEWING MACHINES. APPLICATION FILED JUNE 3,1915.

1 203,984. Patented Nov. 7, 1916.

srx'rns FAN ATTACHMENT FOR SEWING-MACHINES.

Application filed June 3, 1915.

To all whom it may concern Be it known that I, LYLE D. COREY, a citizen of the United States, residing at Minne- .apolis, in the county of Hennep-in and State of Minnesota, have invented certain new and useful Improvements in Fan Attachments for Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an extremely simple and highly efiicient fan attachment for sewing machines, the pur pose of which is to create a current of air to cool the operator of the machine.

To the above end, the invention consists of the novel devices and combinations of devices, hereinafter described and defined in the claims. a

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a fragmentary view in front elevation of a sewing machine, having the invention applied thereto; Fig. 2 is a view partly in elevation and partly in section taken on the lines a :0 of Fig. 1; Fig. 3 is a view partly in elevation and partly in section taken on the line 03 m of Fig. 2; Fig. 4 is a detail view of the inner rim of the fan with some parts sectioned on the line 09 m of Fig. 2; and Fig. 5 is a detail view of the outer rim of the fan.

Of the parts of the sewing machine, illustrated for the purpose of showing the-improved attachment applied in working posi tion, the numeral 1 indicates the arm and the numeral 2 the fly or brand wheel having integrally formed therewith the customary grooved belt sheave or pulley 3.

The improved fan attachment comprises inner and outer rims 4 and 5, respectively, and fan-blades 6, which afiord oblique braces connecting the said two rims. Both rims 4 and 5 are channel-shape in cross section, as best shown in Fig. 3, and the fan-blades 6 are located entirely within the planesof the edges of said rims. It will also be noted, by reference to Fig. 3, that the forward edge portions of the fan-blades 6, with respect to rotation of the fan are made blunt by rolling the blades inward upon themselves.

The rims 4 and 5 are transversely divided on substantially the same radial line with Specification of Letters Patent.

Patented. Nov. *7, 1916.

Serial No. 31,857.

the ends of the inner rim spaced apart and the ends of the outer rim overlapped, as shown in Fig. 2. The inner rim 4 is also again transversely divided at a diametrically opposite point and the two sections of said rim connected by a flexible joint 7, see Fig. 2. This joint 7 comprises a curved tongue on one of the rim sections and a transverse slot in the other rim section, with which said tongue is interlocked.

The inner rim 4 is adapted to be mounted on the rim of the fly-wheel 2 by first expanding the two rims and then contracting the same for frictionally clamping the inner rim 4 onto the rim of the fly-wheel 2, as best shown in Fig. 3. In applying the inner rim 4 to the rim of the fly-wheel 2, it is necessary to expand the same suiiiciently to permit the inner rim to be telescoped over the fly-wheel 2 by an edgewise movement.- As the fanblades 6 are rigidly secured to the rims 4 and 5, the joint 7 is necessary in order to obtain the necessary expansion of the inner rim 4 in applying the same to or removing it from the fly-wheel 2.

The circumferential expansion and contraction of the two rims 4 and 5 is accomplished by a pair of levers 8 fulcrumed one to one end of each rim 4 and 5. A link 9 connects each lever 8 with the other end of the respective rim. As best shown in Fig. 5, the levers 8 are fulcrumed to opposite ends of the rims 4 and 5, and the links 9 are pivoted at one of their ends to the intermediate portions of the levers 8 and at their other ends to respective rims 4 and 5. The movement of the levers ,8 into operative positions is limited by the engagement of the free end portions of said levers with certain of the fan-blades 6 which act as stops. Said levers, however, do not engage the fanblades, until the pivotal connections between the levers 8 and links 9 have passed dead centers. In this position of the levers 8 and same, when in operative positions, securely brace the ends of said rims against edgewise movements. Suiticient tension is placed on the outer link 9 to yieldingly draw the overlapped ends of the outer rim 5 together. One of the ends of the rim 5 to which the respective lever 8 is .secured is reinforced to receive the pivot of said lever, preferably by reducing the transverse width of the rim and then bending the same upon the main body thereof. It is, of course, understood that the ends of the rim 4 may be reinforced in a like manner.

By constructing a fan attachment with the tan-blades and devices for circumterentially' expanding and contracting the rims, located, when in operative positions, entirely between the planes oi the edges of the rims, leaves no projections, whatsoever, which would be liable to injure'an operator. The blunt edges of the tan-blades 6 also, prevent an operator from being cut, in case he should place his hand against the edge portion of the fan. The outer rim 5 takes the place of the rim of the iiy-wheel 2, which, as is well known, is constantly used by an operator in slowing up or stopping his machine, by placing his hand thereon. It will be noted, by reference to Fig. 2, that the cuteredge portion of the rim 5 projects away from the direction of rotation of the fan, which is in the direction of the arrow marked on Fig. 2. The purpose of thus over-lapping the ends of the outer rim 5 is to prevent the exposed edge portion of said rim from striking the hand of? the operator.

The above described fan attachment, while extremely simple, and of comparatively small cost to manufacture, has, in actual usage on power sewing machines, proven highly eiiicient for the purpose had in view. It is also, evident that the fan attachment may be very quickly applied to or removed from the fly-wheel of the machine.

lVhat I claim is:

l. The combination with a rotatable wheel, of a fan comprising inner and outer concentric rims, fan-blades located entirely inward of the outer rim and aiifording braces connecting the rims, said outer rim having a smooth exterior and means for detachably connecting the inner rim tothe rotatable wheel.

'2. The combination with a rotatable wheel, of a fan comprising inner and outer concentric rims, fan-blades affording oblique braces connecting the rims, said fan-blades being located entirely between the planes of the edges of the rims, the forward edges of the fan-blades, with respect to the direction of rotation of the fan, being made blunt, said outer rim being segmental in cross section and having a smooth exterior, and means for detachably connecting the inner rim to the rotatable wheel' 3. The combination with a rotatable wheel, of a tan comprising inner and outer concentric rims, fan-blades affording braces connecting the rims, sald inner rim being transversely divided and channel-shape in cross section to receive the rim of the rotatable wheel, and means for circumferentially contracting the inner rim for clamping the same onto the 'rim or" the rotatable wheel.

i. The combination 'with a rotatable wheel, of a fan comprising inner and outer concentric rims, fan-blades affording braces connecting the rims, said inner rim being transversely divided and channel-shape in cross section to receive the rim of the rotatable wheel, said inner rim also having a flexible joint, and means for circumferentially contracting the inner rim for clamping the same onto the rim of the rotatable wheel.

The combination with a rotatable wheel, of a fan comprising transversely divided inner and outer concentric rims, fanblades affording braces connecting the rims, said inner rim being channel-shape in cross section to receive the 'rimof the rotatable wheel, and means for contracting the inner rim for clamping the same onto the rim of therotatable wheel. 7

6. The combination with a rotatable wheel, of a fan comprising transversely divided inner and outer concentric rims, fanblades aitording braces connecting the rims, said inner rim being channel-shapein cross section'to receive the rim of the rotatable member and having a fiexible j oint, and means for contracting the inner rim for clamping the same onto the rim of The rotatable wheel.

7. The combination with a rotatable w reel, of a fan comprising transversely divided inner and outer concentric rims, fanblades affording braces connectingthe rims, said inner rim being channel-shape in cross section to receive the rim of the rotatable member and having a flexible joint, and inde pendent means for contracting the inner and: V outer rims for clamping the lnner rim onto the rim of the rotatable wheel.

8. The combination with a rotatable wheel, of a fan comprising transversely divided inner and'outer concentric rims, fan blades adording braces connecting the rims, said inner rim being channel-shape in cross section to receive the rim of the rotatable wheel. a lever pivoted to one of the ends of each of the rims, anda linkconnecting each lever to the other end of the respective rim,

said levers and links being provided for contracting the rims for clamping the inner rim onto the rim of the rotatable wheel.

9. The combination with. a rotatable wheel, of a fan comprising transversely divided inner and outer concentric rims, fanblades afiording braces connecting the rims,

saidinner rim being channel-shape in cross section to receive the rim of the rotatablewheel, a lever pivoted to one of the ends of each of the rims, and a link connecting each lever to the other end of the respective rim, said levers and links being provided for contracting the rims for clamping the inner rim onto the rim of the rotatable wheel, said two levers being pivoted to the rims for movements from operative positions, between the planes of the edges of the rims, into inoperative positions on opposite sides of the rims, outward of their edges.

10. The combination with a rotatable wheel, of a fan comprising transversely divided inner and outer concentric rims, fanblades affording braces connecting the rims, said inner rim being channel-shape in cross section to receive the rim of the rotatable wheel, a lever pivoted to one of the ends of each of the rims, and links connecting the lovers to the other ends of the respective rims, said levers and links being provided for contracting the rims for clamping the inner rim onto the rim of the rotatable wheel, said two levers being pivoted to the opposite ends of the rims for movements from operative positions, between the planes of the edges of the rims, into inoperative positions on opposite sides of the rims, outward of their edges, the pivotal connections between the levers and links arranged to be moved past dead centers for holding the levers in operative positions.

11. The combination with a rotatable wheel, of a fan comprising a transversely divided channel'shape rim adapted to embrace the rim of the rotatable wheel, a lever pivoted to one end of the rim of the fan, and a link connecting the lever to the other end of the rim of the fan, the pivotal connection between the lever and link adapted to be moved past a dead center for holding the lever in an operative position, said lever and link being provided for contracting the rim of.the fan for clamping the same onto the rim of the rotatable wheel.

12. The combination with a rotatable wheel, of a fan comprising a transversely divided channel-shape rim adapted to embrace the rim of the rotatable wheel, a lever pivoted to one end of the rim of the fan, and a link connecting the lever to the other end of the rim of the fan,the pivotal connection between the lever and link adapted to be moved past a dead center for holding the lever in an operative position, said lever and link being provided for contracting the rim of the fan for clamping the same onto the rim of the rotatable wheel, said lever arranged to engage one of the fan-blades to limit its movement into an operative position.

13. The combination with a rotatable wheel, of a fan comprising transversely divided inner and outer concentric rims, fanblades affording braces connecting the rims, said inner rim being channel-shape in cross section to receive the rim of the rotatable wheel, the ends of the outer rim being overlapped for sliding movement, one on the other, and independent means for circumferentially contracting said rims for clamping the inner rim onto the rim of the rotatable wheel, and means for circumferentially contracting the outer rim arranged to yieldingly draw the overlapped ends thereof together.

14:. The combination with a rotatable wheel, of a fan comprising transversely divided inner and outer concentric rims, fanblades aiiording braces connecting the rims, said inner rim being channel-shape in cross section to receive the rim of the rotatable wheel, a lever pivoted to one of the ends of each of the rims, and links connecting the levers to the other ends of the respective rims, Said levers and links being provided for contracting the rims for clamping the inner rim onto the rim of the rotatable wheel, the pivotal connections between the levers and links, arranged to move past dead centers, for holding the levers in operative positions, said levers arranged to engage certain of the fan-blades to limit their movements into operative positions.

In testimony whereof I aflix my signature in presence of two witnesses.

LYLE D. COREY.

Witnesses:

EVA E. K6NIG, HARRY KILGQRE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

